1 /* $NetBSD: parse.c,v 1.96 2004/05/07 00:04:40 ross Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: parse.c,v 1.96 2004/05/07 00:04:40 ross Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78 #else 79 __RCSID("$NetBSD: parse.c,v 1.96 2004/05/07 00:04:40 ross Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the #include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the #include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <ctype.h> 127 #include <errno.h> 128 #include <stdarg.h> 129 #include <stdio.h> 130 131 #include "make.h" 132 #include "hash.h" 133 #include "dir.h" 134 #include "job.h" 135 #include "buf.h" 136 #include "pathnames.h" 137 138 /* 139 * These values are returned by ParseEOF to tell Parse_File whether to 140 * CONTINUE parsing, i.e. it had only reached the end of an include file, 141 * or if it's DONE. 142 */ 143 #define CONTINUE 1 144 #define DONE 0 145 static Lst targets; /* targets we're working on */ 146 #ifdef CLEANUP 147 static Lst targCmds; /* command lines for targets */ 148 #endif 149 static Boolean inLine; /* true if currently in a dependency 150 * line or its commands */ 151 typedef struct { 152 char *str; 153 char *ptr; 154 } PTR; 155 156 static int fatals = 0; 157 158 static GNode *mainNode; /* The main target to create. This is the 159 * first target on the first dependency 160 * line in the first makefile */ 161 typedef struct IFile { 162 char *fname; /* name of previous file */ 163 int lineno; /* saved line number */ 164 FILE * F; /* the open stream */ 165 PTR * P; /* the char pointer */ 166 } IFile; 167 168 static IFile curFile; 169 170 171 /* 172 * Definitions for handling #include specifications 173 */ 174 175 static Lst includes; /* stack of IFiles generated by 176 * #includes */ 177 Lst parseIncPath; /* list of directories for "..." includes */ 178 Lst sysIncPath; /* list of directories for <...> includes */ 179 Lst defIncPath; /* default directories for <...> includes */ 180 181 /*- 182 * specType contains the SPECial TYPE of the current target. It is 183 * Not if the target is unspecial. If it *is* special, however, the children 184 * are linked as children of the parent but not vice versa. This variable is 185 * set in ParseDoDependency 186 */ 187 typedef enum { 188 Begin, /* .BEGIN */ 189 Default, /* .DEFAULT */ 190 End, /* .END */ 191 Ignore, /* .IGNORE */ 192 Includes, /* .INCLUDES */ 193 Interrupt, /* .INTERRUPT */ 194 Libs, /* .LIBS */ 195 MFlags, /* .MFLAGS or .MAKEFLAGS */ 196 Main, /* .MAIN and we don't have anything user-specified to 197 * make */ 198 NoExport, /* .NOEXPORT */ 199 NoPath, /* .NOPATH */ 200 Not, /* Not special */ 201 NotParallel, /* .NOTPARALLEL */ 202 Null, /* .NULL */ 203 ExObjdir, /* .OBJDIR */ 204 Order, /* .ORDER */ 205 Parallel, /* .PARALLEL */ 206 ExPath, /* .PATH */ 207 Phony, /* .PHONY */ 208 #ifdef POSIX 209 Posix, /* .POSIX */ 210 #endif 211 Precious, /* .PRECIOUS */ 212 ExShell, /* .SHELL */ 213 Silent, /* .SILENT */ 214 SingleShell, /* .SINGLESHELL */ 215 Suffixes, /* .SUFFIXES */ 216 Wait, /* .WAIT */ 217 Attribute /* Generic attribute */ 218 } ParseSpecial; 219 220 static ParseSpecial specType; 221 static int waiting; 222 223 #define LPAREN '(' 224 #define RPAREN ')' 225 /* 226 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 227 * seen, then set to each successive source on the line. 228 */ 229 static GNode *predecessor; 230 231 /* 232 * The parseKeywords table is searched using binary search when deciding 233 * if a target or source is special. The 'spec' field is the ParseSpecial 234 * type of the keyword ("Not" if the keyword isn't special as a target) while 235 * the 'op' field is the operator to apply to the list of targets if the 236 * keyword is used as a source ("0" if the keyword isn't special as a source) 237 */ 238 static struct { 239 const char *name; /* Name of keyword */ 240 ParseSpecial spec; /* Type when used as a target */ 241 int op; /* Operator when used as a source */ 242 } parseKeywords[] = { 243 { ".BEGIN", Begin, 0 }, 244 { ".DEFAULT", Default, 0 }, 245 { ".END", End, 0 }, 246 { ".EXEC", Attribute, OP_EXEC }, 247 { ".IGNORE", Ignore, OP_IGNORE }, 248 { ".INCLUDES", Includes, 0 }, 249 { ".INTERRUPT", Interrupt, 0 }, 250 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 251 { ".JOIN", Attribute, OP_JOIN }, 252 { ".LIBS", Libs, 0 }, 253 { ".MADE", Attribute, OP_MADE }, 254 { ".MAIN", Main, 0 }, 255 { ".MAKE", Attribute, OP_MAKE }, 256 { ".MAKEFLAGS", MFlags, 0 }, 257 { ".MFLAGS", MFlags, 0 }, 258 { ".NOPATH", NoPath, OP_NOPATH }, 259 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 260 { ".NOTPARALLEL", NotParallel, 0 }, 261 { ".NO_PARALLEL", NotParallel, 0 }, 262 { ".NULL", Null, 0 }, 263 { ".OBJDIR", ExObjdir, 0 }, 264 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 265 { ".ORDER", Order, 0 }, 266 { ".PARALLEL", Parallel, 0 }, 267 { ".PATH", ExPath, 0 }, 268 { ".PHONY", Phony, OP_PHONY }, 269 #ifdef POSIX 270 { ".POSIX", Posix, 0 }, 271 #endif 272 { ".PRECIOUS", Precious, OP_PRECIOUS }, 273 { ".RECURSIVE", Attribute, OP_MAKE }, 274 { ".SHELL", ExShell, 0 }, 275 { ".SILENT", Silent, OP_SILENT }, 276 { ".SINGLESHELL", SingleShell, 0 }, 277 { ".SUFFIXES", Suffixes, 0 }, 278 { ".USE", Attribute, OP_USE }, 279 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 280 { ".WAIT", Wait, 0 }, 281 }; 282 283 /* 284 * Used by ParseDoSpecialSrc() 285 */ 286 typedef struct { 287 int op; 288 char *src; 289 Lst allsrc; 290 } SpecialSrc; 291 292 static int ParseIsEscaped(const char *, const char *); 293 static void ParseErrorInternal(char *, size_t, int, const char *, ...) 294 __attribute__((__format__(__printf__, 4, 5))); 295 static void ParseVErrorInternal(char *, size_t, int, const char *, va_list) 296 __attribute__((__format__(__printf__, 4, 0))); 297 static int ParseFindKeyword(char *); 298 static int ParseLinkSrc(ClientData, ClientData); 299 static int ParseDoOp(ClientData, ClientData); 300 static int ParseAddDep(ClientData, ClientData); 301 static int ParseDoSpecialSrc(ClientData, ClientData); 302 static void ParseDoSrc(int, char *, Lst, Boolean); 303 static int ParseFindMain(ClientData, ClientData); 304 static int ParseAddDir(ClientData, ClientData); 305 static int ParseClearPath(ClientData, ClientData); 306 static void ParseDoDependency(char *); 307 static int ParseAddCmd(ClientData, ClientData); 308 static __inline int ParseReadc(void); 309 static void ParseUnreadc(int); 310 static void ParseHasCommands(ClientData); 311 static void ParseDoInclude(char *); 312 static void ParseSetParseFile(char *); 313 #ifdef SYSVINCLUDE 314 static void ParseTraditionalInclude(char *); 315 #endif 316 static int ParseEOF(int); 317 static char *ParseReadLine(void); 318 static char *ParseSkipLine(int, int); 319 static void ParseFinishLine(void); 320 static void ParseMark(GNode *); 321 322 extern int maxJobs; 323 324 325 /*- 326 *---------------------------------------------------------------------- 327 * ParseIsEscaped -- 328 * Check if the current character is escaped on the current line 329 * 330 * Results: 331 * 0 if the character is not backslash escaped, 1 otherwise 332 * 333 * Side Effects: 334 * None 335 *---------------------------------------------------------------------- 336 */ 337 static int 338 ParseIsEscaped(const char *line, const char *c) 339 { 340 int active = 0; 341 for (;;) { 342 if (line == c) 343 return active; 344 if (*--c != '\\') 345 return active; 346 active = !active; 347 } 348 } 349 350 /*- 351 *---------------------------------------------------------------------- 352 * ParseFindKeyword -- 353 * Look in the table of keywords for one matching the given string. 354 * 355 * Input: 356 * str String to find 357 * 358 * Results: 359 * The index of the keyword, or -1 if it isn't there. 360 * 361 * Side Effects: 362 * None 363 *---------------------------------------------------------------------- 364 */ 365 static int 366 ParseFindKeyword(char *str) 367 { 368 int start, end, cur; 369 int diff; 370 371 start = 0; 372 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 373 374 do { 375 cur = start + ((end - start) / 2); 376 diff = strcmp (str, parseKeywords[cur].name); 377 378 if (diff == 0) { 379 return (cur); 380 } else if (diff < 0) { 381 end = cur - 1; 382 } else { 383 start = cur + 1; 384 } 385 } while (start <= end); 386 return (-1); 387 } 388 389 /*- 390 * ParseVErrorInternal -- 391 * Error message abort function for parsing. Prints out the context 392 * of the error (line number and file) as well as the message with 393 * two optional arguments. 394 * 395 * Results: 396 * None 397 * 398 * Side Effects: 399 * "fatals" is incremented if the level is PARSE_FATAL. 400 */ 401 /* VARARGS */ 402 static void 403 ParseVErrorInternal(char *cfname, size_t clineno, int type, const char *fmt, 404 va_list ap) 405 { 406 static Boolean fatal_warning_error_printed = FALSE; 407 408 (void)fprintf(stderr, "%s: \"", progname); 409 410 if (*cfname != '/') { 411 char *cp; 412 const char *dir; 413 414 /* 415 * Nothing is more anoying than not knowing which Makefile 416 * is the culprit. 417 */ 418 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 419 if (dir == NULL || *dir == '\0' || 420 (*dir == '.' && dir[1] == '\0')) 421 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 422 if (dir == NULL) 423 dir = "."; 424 425 (void)fprintf(stderr, "%s/%s", dir, cfname); 426 } else 427 (void)fprintf(stderr, "%s", cfname); 428 429 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 430 if (type == PARSE_WARNING) 431 (void)fprintf(stderr, "warning: "); 432 (void)vfprintf(stderr, fmt, ap); 433 (void)fprintf(stderr, "\n"); 434 (void)fflush(stderr); 435 if (type == PARSE_FATAL || parseWarnFatal) 436 fatals += 1; 437 if (parseWarnFatal && !fatal_warning_error_printed) { 438 Error("parsing warnings being treated as errors"); 439 fatal_warning_error_printed = TRUE; 440 } 441 } 442 443 /*- 444 * ParseErrorInternal -- 445 * Error function 446 * 447 * Results: 448 * None 449 * 450 * Side Effects: 451 * None 452 */ 453 /* VARARGS */ 454 static void 455 ParseErrorInternal(char *cfname, size_t clineno, int type, const char *fmt, ...) 456 { 457 va_list ap; 458 459 va_start(ap, fmt); 460 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 461 va_end(ap); 462 } 463 464 /*- 465 * Parse_Error -- 466 * External interface to ParseErrorInternal; uses the default filename 467 * Line number. 468 * 469 * Results: 470 * None 471 * 472 * Side Effects: 473 * None 474 */ 475 /* VARARGS */ 476 void 477 Parse_Error(int type, const char *fmt, ...) 478 { 479 va_list ap; 480 481 va_start(ap, fmt); 482 ParseVErrorInternal(curFile.fname, curFile.lineno, type, fmt, ap); 483 va_end(ap); 484 } 485 486 /*- 487 *--------------------------------------------------------------------- 488 * ParseLinkSrc -- 489 * Link the parent node to its new child. Used in a Lst_ForEach by 490 * ParseDoDependency. If the specType isn't 'Not', the parent 491 * isn't linked as a parent of the child. 492 * 493 * Input: 494 * pgnp The parent node 495 * cgpn The child node 496 * 497 * Results: 498 * Always = 0 499 * 500 * Side Effects: 501 * New elements are added to the parents list of cgn and the 502 * children list of cgn. the unmade field of pgn is updated 503 * to reflect the additional child. 504 *--------------------------------------------------------------------- 505 */ 506 static int 507 ParseLinkSrc(ClientData pgnp, ClientData cgnp) 508 { 509 GNode *pgn = (GNode *) pgnp; 510 GNode *cgn = (GNode *) cgnp; 511 512 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 513 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 514 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 515 if (specType == Not) 516 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 517 pgn->unmade += 1; 518 return (0); 519 } 520 521 /*- 522 *--------------------------------------------------------------------- 523 * ParseDoOp -- 524 * Apply the parsed operator to the given target node. Used in a 525 * Lst_ForEach call by ParseDoDependency once all targets have 526 * been found and their operator parsed. If the previous and new 527 * operators are incompatible, a major error is taken. 528 * 529 * Input: 530 * gnp The node to which the operator is to be applied 531 * opp The operator to apply 532 * 533 * Results: 534 * Always 0 535 * 536 * Side Effects: 537 * The type field of the node is altered to reflect any new bits in 538 * the op. 539 *--------------------------------------------------------------------- 540 */ 541 static int 542 ParseDoOp(ClientData gnp, ClientData opp) 543 { 544 GNode *gn = (GNode *) gnp; 545 int op = *(int *) opp; 546 /* 547 * If the dependency mask of the operator and the node don't match and 548 * the node has actually had an operator applied to it before, and 549 * the operator actually has some dependency information in it, complain. 550 */ 551 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 552 !OP_NOP(gn->type) && !OP_NOP(op)) 553 { 554 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 555 return (1); 556 } 557 558 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 559 /* 560 * If the node was the object of a :: operator, we need to create a 561 * new instance of it for the children and commands on this dependency 562 * line. The new instance is placed on the 'cohorts' list of the 563 * initial one (note the initial one is not on its own cohorts list) 564 * and the new instance is linked to all parents of the initial 565 * instance. 566 */ 567 GNode *cohort; 568 569 /* 570 * Propagate copied bits to the initial node. They'll be propagated 571 * back to the rest of the cohorts later. 572 */ 573 gn->type |= op & ~OP_OPMASK; 574 575 cohort = Targ_NewGN(gn->name); 576 /* 577 * Make the cohort invisible as well to avoid duplicating it into 578 * other variables. True, parents of this target won't tend to do 579 * anything with their local variables, but better safe than 580 * sorry. (I think this is pointless now, since the relevant list 581 * traversals will no longer see this node anyway. -mycroft) 582 */ 583 cohort->type = op | OP_INVISIBLE; 584 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 585 cohort->centurion = gn; 586 gn->unmade_cohorts += 1; 587 } else { 588 /* 589 * We don't want to nuke any previous flags (whatever they were) so we 590 * just OR the new operator into the old 591 */ 592 gn->type |= op; 593 } 594 595 return (0); 596 } 597 598 /*- 599 *--------------------------------------------------------------------- 600 * ParseAddDep -- 601 * Check if the pair of GNodes given needs to be synchronized. 602 * This has to be when two nodes are on different sides of a 603 * .WAIT directive. 604 * 605 * Results: 606 * Returns 1 if the two targets need to be ordered, 0 otherwise. 607 * If it returns 1, the search can stop 608 * 609 * Side Effects: 610 * A dependency can be added between the two nodes. 611 * 612 *--------------------------------------------------------------------- 613 */ 614 static int 615 ParseAddDep(ClientData pp, ClientData sp) 616 { 617 GNode *p = (GNode *) pp; 618 GNode *s = (GNode *) sp; 619 620 if (p->order < s->order) { 621 /* 622 * XXX: This can cause loops, and loops can cause unmade targets, 623 * but checking is tedious, and the debugging output can show the 624 * problem 625 */ 626 (void)Lst_AtEnd(p->successors, (ClientData)s); 627 (void)Lst_AtEnd(s->preds, (ClientData)p); 628 return 0; 629 } 630 else 631 return 1; 632 } 633 634 /* - 635 *--------------------------------------------------------------------- 636 * ParseDoSpecialSrc -- 637 * ParseDoSrc struck an unexpanded variable in a src. 638 * The most likely reason is a src that refers to .TARGET or 639 * .PREFIX so we get called to set those for each target 640 * and then call ParseDoSrc again to do the real work. 641 * 642 * Input: 643 * tp A target GNode * 644 * sp A SpecialSrc * which contains the args we need 645 * for ParseDoSrc. 646 * 647 * Results: 648 * Goodness 649 * 650 * Side Effects: 651 * The target GNode will have .TARGET and .PREFIX set, this seems 652 * harmless. 653 */ 654 static int 655 ParseDoSpecialSrc(ClientData tp, ClientData sp) 656 { 657 GNode *tn = (GNode *) tp; 658 GNode *gn; 659 SpecialSrc *ss = (SpecialSrc *) sp; 660 char *cp; 661 char *cp2; 662 char *pref; 663 664 /* 665 * If the target is a suffix rule, leave it alone. 666 */ 667 if (Suff_IsTransform(tn->name)) { 668 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 669 return 0; 670 } 671 Var_Set(TARGET, tn->name, tn, 0); 672 if ((pref = strrchr(tn->name, '/'))) 673 pref++; 674 else 675 pref = tn->name; 676 if ((cp2 = strchr(pref, '.')) > pref) { 677 cp = estrdup(pref); 678 cp[cp2 - pref] = '\0'; 679 Var_Set(PREFIX, cp, tn, 0); 680 free(cp); 681 } else 682 Var_Set(PREFIX, pref, tn, 0); 683 cp = Var_Subst(NULL, ss->src, tn, FALSE); 684 if (strchr(cp, '$')) { 685 Parse_Error(PARSE_WARNING, "Cannot resolve '%s' here", ss->src); 686 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 687 return 1; /* stop list traversal */ 688 } 689 /* 690 * We don't want to make every target dependent on sources for 691 * other targets. This is the bit of ParseDoSrc which is relevant. 692 * The main difference is we don't link the resolved src to all targets. 693 */ 694 gn = Targ_FindNode (cp, TARG_CREATE); 695 if (ss->op) { 696 gn->type |= ss->op; 697 } else { 698 ParseLinkSrc((ClientData)tn, (ClientData)gn); 699 } 700 gn->order = waiting; 701 (void)Lst_AtEnd(ss->allsrc, (ClientData)gn); 702 if (waiting) { 703 Lst_ForEach(ss->allsrc, ParseAddDep, (ClientData)gn); 704 } 705 return 0; 706 } 707 708 709 /*- 710 *--------------------------------------------------------------------- 711 * ParseDoSrc -- 712 * Given the name of a source, figure out if it is an attribute 713 * and apply it to the targets if it is. Else decide if there is 714 * some attribute which should be applied *to* the source because 715 * of some special target and apply it if so. Otherwise, make the 716 * source be a child of the targets in the list 'targets' 717 * 718 * Input: 719 * tOp operator (if any) from special targets 720 * src name of the source to handle 721 * allsrc List of all sources to wait for 722 * resolve boolean - should we try and resolve .TARGET refs. 723 * 724 * Results: 725 * None 726 * 727 * Side Effects: 728 * Operator bits may be added to the list of targets or to the source. 729 * The targets may have a new source added to their lists of children. 730 *--------------------------------------------------------------------- 731 */ 732 static void 733 ParseDoSrc(int tOp, char *src, Lst allsrc, Boolean resolve) 734 { 735 GNode *gn = NULL; 736 737 if (*src == '.' && isupper ((unsigned char)src[1])) { 738 int keywd = ParseFindKeyword(src); 739 if (keywd != -1) { 740 int op = parseKeywords[keywd].op; 741 if (op != 0) { 742 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 743 return; 744 } 745 if (parseKeywords[keywd].spec == Wait) { 746 waiting++; 747 return; 748 } 749 } 750 } 751 752 switch (specType) { 753 case Main: 754 /* 755 * If we have noted the existence of a .MAIN, it means we need 756 * to add the sources of said target to the list of things 757 * to create. The string 'src' is likely to be free, so we 758 * must make a new copy of it. Note that this will only be 759 * invoked if the user didn't specify a target on the command 760 * line. This is to allow #ifmake's to succeed, or something... 761 */ 762 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 763 /* 764 * Add the name to the .TARGETS variable as well, so the user cna 765 * employ that, if desired. 766 */ 767 Var_Append(".TARGETS", src, VAR_GLOBAL); 768 return; 769 770 case Order: 771 /* 772 * Create proper predecessor/successor links between the previous 773 * source and the current one. 774 */ 775 gn = Targ_FindNode(src, TARG_CREATE); 776 if (predecessor != NILGNODE) { 777 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 778 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 779 } 780 /* 781 * The current source now becomes the predecessor for the next one. 782 */ 783 predecessor = gn; 784 break; 785 786 default: 787 /* 788 * If the source is not an attribute, we need to find/create 789 * a node for it. After that we can apply any operator to it 790 * from a special target or link it to its parents, as 791 * appropriate. 792 * 793 * In the case of a source that was the object of a :: operator, 794 * the attribute is applied to all of its instances (as kept in 795 * the 'cohorts' list of the node) or all the cohorts are linked 796 * to all the targets. 797 */ 798 if (resolve && strchr(src, '$')) { 799 SpecialSrc ss; 800 801 ss.op = tOp; 802 ss.src = src; 803 ss.allsrc = allsrc; 804 805 /* 806 * If src cannot be fully resolved, we'll be called again 807 * with resolve==FALSE. 808 */ 809 Lst_ForEach(targets, ParseDoSpecialSrc, (ClientData)&ss); 810 return; 811 } 812 gn = Targ_FindNode (src, TARG_CREATE); 813 if (tOp) { 814 gn->type |= tOp; 815 } else { 816 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 817 } 818 break; 819 } 820 821 gn->order = waiting; 822 (void)Lst_AtEnd(allsrc, (ClientData)gn); 823 if (waiting) { 824 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 825 } 826 } 827 828 /*- 829 *----------------------------------------------------------------------- 830 * ParseFindMain -- 831 * Find a real target in the list and set it to be the main one. 832 * Called by ParseDoDependency when a main target hasn't been found 833 * yet. 834 * 835 * Input: 836 * gnp Node to examine 837 * 838 * Results: 839 * 0 if main not found yet, 1 if it is. 840 * 841 * Side Effects: 842 * mainNode is changed and Targ_SetMain is called. 843 * 844 *----------------------------------------------------------------------- 845 */ 846 static int 847 ParseFindMain(ClientData gnp, ClientData dummy) 848 { 849 GNode *gn = (GNode *) gnp; 850 if ((gn->type & OP_NOTARGET) == 0) { 851 mainNode = gn; 852 Targ_SetMain(gn); 853 return (dummy ? 1 : 1); 854 } else { 855 return (dummy ? 0 : 0); 856 } 857 } 858 859 /*- 860 *----------------------------------------------------------------------- 861 * ParseAddDir -- 862 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 863 * 864 * Results: 865 * === 0 866 * 867 * Side Effects: 868 * See Dir_AddDir. 869 * 870 *----------------------------------------------------------------------- 871 */ 872 static int 873 ParseAddDir(ClientData path, ClientData name) 874 { 875 (void) Dir_AddDir((Lst) path, (char *) name); 876 return(0); 877 } 878 879 /*- 880 *----------------------------------------------------------------------- 881 * ParseClearPath -- 882 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 883 * 884 * Results: 885 * === 0 886 * 887 * Side Effects: 888 * See Dir_ClearPath 889 * 890 *----------------------------------------------------------------------- 891 */ 892 static int 893 ParseClearPath(ClientData path, ClientData dummy) 894 { 895 Dir_ClearPath((Lst) path); 896 return(dummy ? 0 : 0); 897 } 898 899 /*- 900 *--------------------------------------------------------------------- 901 * ParseDoDependency -- 902 * Parse the dependency line in line. 903 * 904 * Input: 905 * line the line to parse 906 * 907 * Results: 908 * None 909 * 910 * Side Effects: 911 * The nodes of the sources are linked as children to the nodes of the 912 * targets. Some nodes may be created. 913 * 914 * We parse a dependency line by first extracting words from the line and 915 * finding nodes in the list of all targets with that name. This is done 916 * until a character is encountered which is an operator character. Currently 917 * these are only ! and :. At this point the operator is parsed and the 918 * pointer into the line advanced until the first source is encountered. 919 * The parsed operator is applied to each node in the 'targets' list, 920 * which is where the nodes found for the targets are kept, by means of 921 * the ParseDoOp function. 922 * The sources are read in much the same way as the targets were except 923 * that now they are expanded using the wildcarding scheme of the C-Shell 924 * and all instances of the resulting words in the list of all targets 925 * are found. Each of the resulting nodes is then linked to each of the 926 * targets as one of its children. 927 * Certain targets are handled specially. These are the ones detailed 928 * by the specType variable. 929 * The storing of transformation rules is also taken care of here. 930 * A target is recognized as a transformation rule by calling 931 * Suff_IsTransform. If it is a transformation rule, its node is gotten 932 * from the suffix module via Suff_AddTransform rather than the standard 933 * Targ_FindNode in the target module. 934 *--------------------------------------------------------------------- 935 */ 936 static void 937 ParseDoDependency(char *line) 938 { 939 char *cp; /* our current position */ 940 GNode *gn; /* a general purpose temporary node */ 941 int op; /* the operator on the line */ 942 char savec; /* a place to save a character */ 943 Lst paths; /* List of search paths to alter when parsing 944 * a list of .PATH targets */ 945 int tOp; /* operator from special target */ 946 Lst sources; /* list of archive source names after 947 * expansion */ 948 Lst curTargs; /* list of target names to be found and added 949 * to the targets list */ 950 Lst curSrcs; /* list of sources in order */ 951 char *lstart = line; 952 Boolean hasWait; /* is .WAIT present in srcs */ 953 954 tOp = 0; 955 956 specType = Not; 957 waiting = 0; 958 paths = (Lst)NULL; 959 960 curTargs = Lst_Init(FALSE); 961 curSrcs = Lst_Init(FALSE); 962 963 do { 964 for (cp = line; 965 *cp && (ParseIsEscaped(lstart, cp) || 966 (!isspace ((unsigned char)*cp) && 967 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 968 cp++) 969 { 970 if (*cp == '$') { 971 /* 972 * Must be a dynamic source (would have been expanded 973 * otherwise), so call the Var module to parse the puppy 974 * so we can safely advance beyond it...There should be 975 * no errors in this, as they would have been discovered 976 * in the initial Var_Subst and we wouldn't be here. 977 */ 978 int length; 979 Boolean freeIt; 980 char *result; 981 982 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 983 984 if (freeIt) { 985 free(result); 986 } 987 cp += length-1; 988 } 989 continue; 990 } 991 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 992 /* 993 * Archives must be handled specially to make sure the OP_ARCHV 994 * flag is set in their 'type' field, for one thing, and because 995 * things like "archive(file1.o file2.o file3.o)" are permissible. 996 * Arch_ParseArchive will set 'line' to be the first non-blank 997 * after the archive-spec. It creates/finds nodes for the members 998 * and places them on the given list, returning SUCCESS if all 999 * went well and FAILURE if there was an error in the 1000 * specification. On error, line should remain untouched. 1001 */ 1002 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 1003 Parse_Error (PARSE_FATAL, 1004 "Error in archive specification: \"%s\"", line); 1005 return; 1006 } else { 1007 continue; 1008 } 1009 } 1010 savec = *cp; 1011 1012 if (!*cp) { 1013 /* 1014 * Ending a dependency line without an operator is a Bozo 1015 * no-no. As a heuristic, this is also often triggered by 1016 * undetected conflicts from cvs/rcs merges. 1017 */ 1018 if ((strncmp(line, "<<<<<<", 6) == 0) || 1019 (strncmp(line, "======", 6) == 0) || 1020 (strncmp(line, ">>>>>>", 6) == 0)) 1021 Parse_Error (PARSE_FATAL, 1022 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1023 else 1024 Parse_Error (PARSE_FATAL, "Need an operator"); 1025 return; 1026 } 1027 *cp = '\0'; 1028 /* 1029 * Have a word in line. See if it's a special target and set 1030 * specType to match it. 1031 */ 1032 if (*line == '.' && isupper ((unsigned char)line[1])) { 1033 /* 1034 * See if the target is a special target that must have it 1035 * or its sources handled specially. 1036 */ 1037 int keywd = ParseFindKeyword(line); 1038 if (keywd != -1) { 1039 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1040 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1041 return; 1042 } 1043 1044 specType = parseKeywords[keywd].spec; 1045 tOp = parseKeywords[keywd].op; 1046 1047 /* 1048 * Certain special targets have special semantics: 1049 * .PATH Have to set the dirSearchPath 1050 * variable too 1051 * .MAIN Its sources are only used if 1052 * nothing has been specified to 1053 * create. 1054 * .DEFAULT Need to create a node to hang 1055 * commands on, but we don't want 1056 * it in the graph, nor do we want 1057 * it to be the Main Target, so we 1058 * create it, set OP_NOTMAIN and 1059 * add it to the list, setting 1060 * DEFAULT to the new node for 1061 * later use. We claim the node is 1062 * A transformation rule to make 1063 * life easier later, when we'll 1064 * use Make_HandleUse to actually 1065 * apply the .DEFAULT commands. 1066 * .PHONY The list of targets 1067 * .NOPATH Don't search for file in the path 1068 * .BEGIN 1069 * .END 1070 * .INTERRUPT Are not to be considered the 1071 * main target. 1072 * .NOTPARALLEL Make only one target at a time. 1073 * .SINGLESHELL Create a shell for each command. 1074 * .ORDER Must set initial predecessor to NIL 1075 */ 1076 switch (specType) { 1077 case ExPath: 1078 if (paths == NULL) { 1079 paths = Lst_Init(FALSE); 1080 } 1081 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 1082 break; 1083 case Main: 1084 if (!Lst_IsEmpty(create)) { 1085 specType = Not; 1086 } 1087 break; 1088 case Begin: 1089 case End: 1090 case Interrupt: 1091 gn = Targ_FindNode(line, TARG_CREATE); 1092 gn->type |= OP_NOTMAIN; 1093 (void)Lst_AtEnd(targets, (ClientData)gn); 1094 break; 1095 case Default: 1096 gn = Targ_NewGN(".DEFAULT"); 1097 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1098 (void)Lst_AtEnd(targets, (ClientData)gn); 1099 DEFAULT = gn; 1100 break; 1101 case NotParallel: 1102 { 1103 maxJobs = 1; 1104 break; 1105 } 1106 case SingleShell: 1107 compatMake = TRUE; 1108 break; 1109 case Order: 1110 predecessor = NILGNODE; 1111 break; 1112 default: 1113 break; 1114 } 1115 } else if (strncmp (line, ".PATH", 5) == 0) { 1116 /* 1117 * .PATH<suffix> has to be handled specially. 1118 * Call on the suffix module to give us a path to 1119 * modify. 1120 */ 1121 Lst path; 1122 1123 specType = ExPath; 1124 path = Suff_GetPath (&line[5]); 1125 if (path == NILLST) { 1126 Parse_Error (PARSE_FATAL, 1127 "Suffix '%s' not defined (yet)", 1128 &line[5]); 1129 return; 1130 } else { 1131 if (paths == (Lst)NULL) { 1132 paths = Lst_Init(FALSE); 1133 } 1134 (void)Lst_AtEnd(paths, (ClientData)path); 1135 } 1136 } 1137 } 1138 1139 /* 1140 * Have word in line. Get or create its node and stick it at 1141 * the end of the targets list 1142 */ 1143 if ((specType == Not) && (*line != '\0')) { 1144 if (Dir_HasWildcards(line)) { 1145 /* 1146 * Targets are to be sought only in the current directory, 1147 * so create an empty path for the thing. Note we need to 1148 * use Dir_Destroy in the destruction of the path as the 1149 * Dir module could have added a directory to the path... 1150 */ 1151 Lst emptyPath = Lst_Init(FALSE); 1152 1153 Dir_Expand(line, emptyPath, curTargs); 1154 1155 Lst_Destroy(emptyPath, Dir_Destroy); 1156 } else { 1157 /* 1158 * No wildcards, but we want to avoid code duplication, 1159 * so create a list with the word on it. 1160 */ 1161 (void)Lst_AtEnd(curTargs, (ClientData)line); 1162 } 1163 1164 while(!Lst_IsEmpty(curTargs)) { 1165 char *targName = (char *)Lst_DeQueue(curTargs); 1166 1167 if (!Suff_IsTransform (targName)) { 1168 gn = Targ_FindNode (targName, TARG_CREATE); 1169 } else { 1170 gn = Suff_AddTransform (targName); 1171 } 1172 1173 (void)Lst_AtEnd (targets, (ClientData)gn); 1174 } 1175 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1176 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1177 } 1178 1179 *cp = savec; 1180 /* 1181 * If it is a special type and not .PATH, it's the only target we 1182 * allow on this line... 1183 */ 1184 if (specType != Not && specType != ExPath) { 1185 Boolean warn = FALSE; 1186 1187 while (*cp && (ParseIsEscaped(lstart, cp) || 1188 ((*cp != '!') && (*cp != ':')))) { 1189 if (ParseIsEscaped(lstart, cp) || 1190 (*cp != ' ' && *cp != '\t')) { 1191 warn = TRUE; 1192 } 1193 cp++; 1194 } 1195 if (warn) { 1196 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1197 } 1198 } else { 1199 while (*cp && isspace ((unsigned char)*cp)) { 1200 cp++; 1201 } 1202 } 1203 line = cp; 1204 } while (*line && (ParseIsEscaped(lstart, line) || 1205 ((*line != '!') && (*line != ':')))); 1206 1207 /* 1208 * Don't need the list of target names anymore... 1209 */ 1210 Lst_Destroy(curTargs, NOFREE); 1211 1212 if (!Lst_IsEmpty(targets)) { 1213 switch(specType) { 1214 default: 1215 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1216 break; 1217 case Default: 1218 case Begin: 1219 case End: 1220 case Interrupt: 1221 /* 1222 * These four create nodes on which to hang commands, so 1223 * targets shouldn't be empty... 1224 */ 1225 case Not: 1226 /* 1227 * Nothing special here -- targets can be empty if it wants. 1228 */ 1229 break; 1230 } 1231 } 1232 1233 /* 1234 * Have now parsed all the target names. Must parse the operator next. The 1235 * result is left in op . 1236 */ 1237 if (*cp == '!') { 1238 op = OP_FORCE; 1239 } else if (*cp == ':') { 1240 if (cp[1] == ':') { 1241 op = OP_DOUBLEDEP; 1242 cp++; 1243 } else { 1244 op = OP_DEPENDS; 1245 } 1246 } else { 1247 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1248 return; 1249 } 1250 1251 cp++; /* Advance beyond operator */ 1252 1253 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1254 1255 /* 1256 * Get to the first source 1257 */ 1258 while (*cp && isspace ((unsigned char)*cp)) { 1259 cp++; 1260 } 1261 line = cp; 1262 1263 /* 1264 * Several special targets take different actions if present with no 1265 * sources: 1266 * a .SUFFIXES line with no sources clears out all old suffixes 1267 * a .PRECIOUS line makes all targets precious 1268 * a .IGNORE line ignores errors for all targets 1269 * a .SILENT line creates silence when making all targets 1270 * a .PATH removes all directories from the search path(s). 1271 */ 1272 if (!*line) { 1273 switch (specType) { 1274 case Suffixes: 1275 Suff_ClearSuffixes (); 1276 break; 1277 case Precious: 1278 allPrecious = TRUE; 1279 break; 1280 case Ignore: 1281 ignoreErrors = TRUE; 1282 break; 1283 case Silent: 1284 beSilent = TRUE; 1285 break; 1286 case ExPath: 1287 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1288 Dir_SetPATH(); 1289 break; 1290 #ifdef POSIX 1291 case Posix: 1292 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1293 break; 1294 #endif 1295 default: 1296 break; 1297 } 1298 } else if (specType == MFlags) { 1299 /* 1300 * Call on functions in main.c to deal with these arguments and 1301 * set the initial character to a null-character so the loop to 1302 * get sources won't get anything 1303 */ 1304 Main_ParseArgLine (line); 1305 *line = '\0'; 1306 } else if (specType == ExShell) { 1307 if (Job_ParseShell (line) != SUCCESS) { 1308 Parse_Error (PARSE_FATAL, "improper shell specification"); 1309 return; 1310 } 1311 *line = '\0'; 1312 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1313 *line = '\0'; 1314 } 1315 1316 /* 1317 * NOW GO FOR THE SOURCES 1318 */ 1319 if ((specType == Suffixes) || (specType == ExPath) || 1320 (specType == Includes) || (specType == Libs) || 1321 (specType == Null) || (specType == ExObjdir)) 1322 { 1323 while (*line) { 1324 /* 1325 * If the target was one that doesn't take files as its sources 1326 * but takes something like suffixes, we take each 1327 * space-separated word on the line as a something and deal 1328 * with it accordingly. 1329 * 1330 * If the target was .SUFFIXES, we take each source as a 1331 * suffix and add it to the list of suffixes maintained by the 1332 * Suff module. 1333 * 1334 * If the target was a .PATH, we add the source as a directory 1335 * to search on the search path. 1336 * 1337 * If it was .INCLUDES, the source is taken to be the suffix of 1338 * files which will be #included and whose search path should 1339 * be present in the .INCLUDES variable. 1340 * 1341 * If it was .LIBS, the source is taken to be the suffix of 1342 * files which are considered libraries and whose search path 1343 * should be present in the .LIBS variable. 1344 * 1345 * If it was .NULL, the source is the suffix to use when a file 1346 * has no valid suffix. 1347 * 1348 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1349 * and will cause make to do a new chdir to that path. 1350 */ 1351 while (*cp && !isspace ((unsigned char)*cp)) { 1352 cp++; 1353 } 1354 savec = *cp; 1355 *cp = '\0'; 1356 switch (specType) { 1357 case Suffixes: 1358 Suff_AddSuffix (line, &mainNode); 1359 break; 1360 case ExPath: 1361 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1362 break; 1363 case Includes: 1364 Suff_AddInclude (line); 1365 break; 1366 case Libs: 1367 Suff_AddLib (line); 1368 break; 1369 case Null: 1370 Suff_SetNull (line); 1371 break; 1372 case ExObjdir: 1373 Main_SetObjdir(line); 1374 break; 1375 default: 1376 break; 1377 } 1378 *cp = savec; 1379 if (savec != '\0') { 1380 cp++; 1381 } 1382 while (*cp && isspace ((unsigned char)*cp)) { 1383 cp++; 1384 } 1385 line = cp; 1386 } 1387 if (paths) { 1388 Lst_Destroy(paths, NOFREE); 1389 } 1390 if (specType == ExPath) 1391 Dir_SetPATH(); 1392 } else { 1393 /* 1394 * We don't need ParseDoSpecialSrc unless .WAIT is present. 1395 */ 1396 hasWait = (strstr(line, ".WAIT") != NULL); 1397 1398 while (*line) { 1399 /* 1400 * The targets take real sources, so we must beware of archive 1401 * specifications (i.e. things with left parentheses in them) 1402 * and handle them accordingly. 1403 */ 1404 while (*cp && !isspace ((unsigned char)*cp)) { 1405 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1406 /* 1407 * Only stop for a left parenthesis if it isn't at the 1408 * start of a word (that'll be for variable changes 1409 * later) and isn't preceded by a dollar sign (a dynamic 1410 * source). 1411 */ 1412 break; 1413 } else { 1414 cp++; 1415 } 1416 } 1417 1418 if (*cp == LPAREN) { 1419 sources = Lst_Init (FALSE); 1420 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1421 Parse_Error (PARSE_FATAL, 1422 "Error in source archive spec \"%s\"", line); 1423 return; 1424 } 1425 1426 while (!Lst_IsEmpty (sources)) { 1427 gn = (GNode *) Lst_DeQueue (sources); 1428 ParseDoSrc (tOp, gn->name, curSrcs, hasWait); 1429 } 1430 Lst_Destroy (sources, NOFREE); 1431 cp = line; 1432 } else { 1433 if (*cp) { 1434 *cp = '\0'; 1435 cp += 1; 1436 } 1437 1438 ParseDoSrc (tOp, line, curSrcs, hasWait); 1439 } 1440 while (*cp && isspace ((unsigned char)*cp)) { 1441 cp++; 1442 } 1443 line = cp; 1444 } 1445 } 1446 1447 if (mainNode == NILGNODE) { 1448 /* 1449 * If we have yet to decide on a main target to make, in the 1450 * absence of any user input, we want the first target on 1451 * the first dependency line that is actually a real target 1452 * (i.e. isn't a .USE or .EXEC rule) to be made. 1453 */ 1454 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1455 } 1456 1457 /* 1458 * Finally, destroy the list of sources 1459 */ 1460 Lst_Destroy(curSrcs, NOFREE); 1461 } 1462 1463 /*- 1464 *--------------------------------------------------------------------- 1465 * Parse_IsVar -- 1466 * Return TRUE if the passed line is a variable assignment. A variable 1467 * assignment consists of a single word followed by optional whitespace 1468 * followed by either a += or an = operator. 1469 * This function is used both by the Parse_File function and main when 1470 * parsing the command-line arguments. 1471 * 1472 * Input: 1473 * line the line to check 1474 * 1475 * Results: 1476 * TRUE if it is. FALSE if it ain't 1477 * 1478 * Side Effects: 1479 * none 1480 *--------------------------------------------------------------------- 1481 */ 1482 Boolean 1483 Parse_IsVar(char *line) 1484 { 1485 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1486 Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1487 int level = 0; 1488 #define ISEQOPERATOR(c) \ 1489 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1490 1491 /* 1492 * Skip to variable name 1493 */ 1494 for (;(*line == ' ') || (*line == '\t'); line++) 1495 continue; 1496 1497 for (; *line != '=' || level != 0; line++) 1498 switch (*line) { 1499 case '\0': 1500 /* 1501 * end-of-line -- can't be a variable assignment. 1502 */ 1503 return FALSE; 1504 1505 case ' ': 1506 case '\t': 1507 /* 1508 * there can be as much white space as desired so long as there is 1509 * only one word before the operator 1510 */ 1511 wasSpace = TRUE; 1512 break; 1513 1514 case LPAREN: 1515 case '{': 1516 level++; 1517 break; 1518 1519 case '}': 1520 case RPAREN: 1521 level--; 1522 break; 1523 1524 default: 1525 if (wasSpace && haveName) { 1526 if (ISEQOPERATOR(*line)) { 1527 /* 1528 * We must have a finished word 1529 */ 1530 if (level != 0) 1531 return FALSE; 1532 1533 /* 1534 * When an = operator [+?!:] is found, the next 1535 * character must be an = or it ain't a valid 1536 * assignment. 1537 */ 1538 if (line[1] == '=') 1539 return haveName; 1540 #ifdef SUNSHCMD 1541 /* 1542 * This is a shell command 1543 */ 1544 if (strncmp(line, ":sh", 3) == 0) 1545 return haveName; 1546 #endif 1547 } 1548 /* 1549 * This is the start of another word, so not assignment. 1550 */ 1551 return FALSE; 1552 } 1553 else { 1554 haveName = TRUE; 1555 wasSpace = FALSE; 1556 } 1557 break; 1558 } 1559 1560 return haveName; 1561 } 1562 1563 /*- 1564 *--------------------------------------------------------------------- 1565 * Parse_DoVar -- 1566 * Take the variable assignment in the passed line and do it in the 1567 * global context. 1568 * 1569 * Note: There is a lexical ambiguity with assignment modifier characters 1570 * in variable names. This routine interprets the character before the = 1571 * as a modifier. Therefore, an assignment like 1572 * C++=/usr/bin/CC 1573 * is interpreted as "C+ +=" instead of "C++ =". 1574 * 1575 * Input: 1576 * line a line guaranteed to be a variable assignment. 1577 * This reduces error checks 1578 * ctxt Context in which to do the assignment 1579 * 1580 * Results: 1581 * none 1582 * 1583 * Side Effects: 1584 * the variable structure of the given variable name is altered in the 1585 * global context. 1586 *--------------------------------------------------------------------- 1587 */ 1588 void 1589 Parse_DoVar(char *line, GNode *ctxt) 1590 { 1591 char *cp; /* pointer into line */ 1592 enum { 1593 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1594 } type; /* Type of assignment */ 1595 char *opc; /* ptr to operator character to 1596 * null-terminate the variable name */ 1597 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1598 * i.e. if any variable expansion was 1599 * performed */ 1600 /* 1601 * Avoid clobbered variable warnings by forcing the compiler 1602 * to ``unregister'' variables 1603 */ 1604 #if __GNUC__ 1605 (void) &cp; 1606 (void) &line; 1607 #endif 1608 1609 /* 1610 * Skip to variable name 1611 */ 1612 while ((*line == ' ') || (*line == '\t')) { 1613 line++; 1614 } 1615 1616 /* 1617 * Skip to operator character, nulling out whitespace as we go 1618 */ 1619 for (cp = line + 1; *cp != '='; cp++) { 1620 if (isspace ((unsigned char)*cp)) { 1621 *cp = '\0'; 1622 } 1623 } 1624 opc = cp-1; /* operator is the previous character */ 1625 *cp++ = '\0'; /* nuke the = */ 1626 1627 /* 1628 * Check operator type 1629 */ 1630 switch (*opc) { 1631 case '+': 1632 type = VAR_APPEND; 1633 *opc = '\0'; 1634 break; 1635 1636 case '?': 1637 /* 1638 * If the variable already has a value, we don't do anything. 1639 */ 1640 *opc = '\0'; 1641 if (Var_Exists(line, ctxt)) { 1642 return; 1643 } else { 1644 type = VAR_NORMAL; 1645 } 1646 break; 1647 1648 case ':': 1649 type = VAR_SUBST; 1650 *opc = '\0'; 1651 break; 1652 1653 case '!': 1654 type = VAR_SHELL; 1655 *opc = '\0'; 1656 break; 1657 1658 default: 1659 #ifdef SUNSHCMD 1660 while (opc > line && *opc != ':') 1661 opc--; 1662 1663 if (strncmp(opc, ":sh", 3) == 0) { 1664 type = VAR_SHELL; 1665 *opc = '\0'; 1666 break; 1667 } 1668 #endif 1669 type = VAR_NORMAL; 1670 break; 1671 } 1672 1673 while (isspace ((unsigned char)*cp)) { 1674 cp++; 1675 } 1676 1677 if (type == VAR_APPEND) { 1678 Var_Append (line, cp, ctxt); 1679 } else if (type == VAR_SUBST) { 1680 /* 1681 * Allow variables in the old value to be undefined, but leave their 1682 * invocation alone -- this is done by forcing oldVars to be false. 1683 * XXX: This can cause recursive variables, but that's not hard to do, 1684 * and this allows someone to do something like 1685 * 1686 * CFLAGS = $(.INCLUDES) 1687 * CFLAGS := -I.. $(CFLAGS) 1688 * 1689 * And not get an error. 1690 */ 1691 Boolean oldOldVars = oldVars; 1692 1693 oldVars = FALSE; 1694 1695 /* 1696 * make sure that we set the variable the first time to nothing 1697 * so that it gets substituted! 1698 */ 1699 if (!Var_Exists(line, ctxt)) 1700 Var_Set(line, "", ctxt, 0); 1701 1702 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1703 oldVars = oldOldVars; 1704 freeCp = TRUE; 1705 1706 Var_Set(line, cp, ctxt, 0); 1707 } else if (type == VAR_SHELL) { 1708 char *res; 1709 const char *err; 1710 1711 if (strchr(cp, '$') != NULL) { 1712 /* 1713 * There's a dollar sign in the command, so perform variable 1714 * expansion on the whole thing. The resulting string will need 1715 * freeing when we're done, so set freeCmd to TRUE. 1716 */ 1717 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1718 freeCp = TRUE; 1719 } 1720 1721 res = Cmd_Exec(cp, &err); 1722 Var_Set(line, res, ctxt, 0); 1723 free(res); 1724 1725 if (err) 1726 Parse_Error(PARSE_WARNING, err, cp); 1727 } else { 1728 /* 1729 * Normal assignment -- just do it. 1730 */ 1731 Var_Set(line, cp, ctxt, 0); 1732 } 1733 if (strcmp(line, MAKEOVERRIDES) == 0) 1734 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1735 else if (strcmp(line, ".CURDIR") == 0) { 1736 /* 1737 * Somone is being (too?) clever... 1738 * Let's pretend they know what they are doing and 1739 * re-initialize the 'cur' Path. 1740 */ 1741 Dir_InitCur(cp); 1742 Dir_SetPATH(); 1743 } 1744 if (freeCp) 1745 free(cp); 1746 } 1747 1748 1749 /*- 1750 * ParseAddCmd -- 1751 * Lst_ForEach function to add a command line to all targets 1752 * 1753 * Input: 1754 * gnp the node to which the command is to be added 1755 * cmd the command to add 1756 * 1757 * Results: 1758 * Always 0 1759 * 1760 * Side Effects: 1761 * A new element is added to the commands list of the node. 1762 */ 1763 static int 1764 ParseAddCmd(ClientData gnp, ClientData cmd) 1765 { 1766 GNode *gn = (GNode *) gnp; 1767 /* if target already supplied, ignore commands */ 1768 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1769 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1770 if (!(gn->type & OP_HAS_COMMANDS)) { 1771 (void)Lst_AtEnd(gn->commands, cmd); 1772 ParseMark(gn); 1773 } else { 1774 #ifdef notyet 1775 /* XXX: We cannot do this until we fix the tree */ 1776 (void)Lst_AtEnd(gn->commands, cmd); 1777 Parse_Error (PARSE_WARNING, 1778 "overriding commands for target \"%s\"; " 1779 "previous commands defined at %s: %d ignored", 1780 gn->name, gn->fname, gn->lineno); 1781 #else 1782 Parse_Error (PARSE_WARNING, 1783 "duplicate script for target \"%s\" ignored", 1784 gn->name); 1785 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1786 "using previous script for \"%s\" defined here", 1787 gn->name); 1788 #endif 1789 } 1790 return(0); 1791 } 1792 1793 /*- 1794 *----------------------------------------------------------------------- 1795 * ParseHasCommands -- 1796 * Callback procedure for Parse_File when destroying the list of 1797 * targets on the last dependency line. Marks a target as already 1798 * having commands if it does, to keep from having shell commands 1799 * on multiple dependency lines. 1800 * 1801 * Input: 1802 * gnp Node to examine 1803 * 1804 * Results: 1805 * None 1806 * 1807 * Side Effects: 1808 * OP_HAS_COMMANDS may be set for the target. 1809 * 1810 *----------------------------------------------------------------------- 1811 */ 1812 static void 1813 ParseHasCommands(ClientData gnp) 1814 { 1815 GNode *gn = (GNode *) gnp; 1816 if (!Lst_IsEmpty(gn->commands)) { 1817 gn->type |= OP_HAS_COMMANDS; 1818 } 1819 } 1820 1821 /*- 1822 *----------------------------------------------------------------------- 1823 * Parse_AddIncludeDir -- 1824 * Add a directory to the path searched for included makefiles 1825 * bracketed by double-quotes. Used by functions in main.c 1826 * 1827 * Input: 1828 * dir The name of the directory to add 1829 * 1830 * Results: 1831 * None. 1832 * 1833 * Side Effects: 1834 * The directory is appended to the list. 1835 * 1836 *----------------------------------------------------------------------- 1837 */ 1838 void 1839 Parse_AddIncludeDir(char *dir) 1840 { 1841 (void) Dir_AddDir (parseIncPath, dir); 1842 } 1843 1844 /*- 1845 *--------------------------------------------------------------------- 1846 * ParseDoInclude -- 1847 * Push to another file. 1848 * 1849 * The input is the line minus the `.'. A file spec is a string 1850 * enclosed in <> or "". The former is looked for only in sysIncPath. 1851 * The latter in . and the directories specified by -I command line 1852 * options 1853 * 1854 * Results: 1855 * None 1856 * 1857 * Side Effects: 1858 * A structure is added to the includes Lst and readProc, lineno, 1859 * fname and curFILE are altered for the new file 1860 *--------------------------------------------------------------------- 1861 */ 1862 static void 1863 ParseDoInclude(char *line) 1864 { 1865 char *fullname; /* full pathname of file */ 1866 IFile *oldFile; /* state associated with current file */ 1867 char endc; /* the character which ends the file spec */ 1868 char *cp; /* current position in file spec */ 1869 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1870 int silent = (*line != 'i') ? 1 : 0; 1871 char *file = &line[7 + silent]; 1872 1873 /* 1874 * Skip to delimiter character so we know where to look 1875 */ 1876 while ((*file == ' ') || (*file == '\t')) { 1877 file++; 1878 } 1879 1880 if ((*file != '"') && (*file != '<')) { 1881 Parse_Error (PARSE_FATAL, 1882 ".include filename must be delimited by '\"' or '<'"); 1883 return; 1884 } 1885 1886 /* 1887 * Set the search path on which to find the include file based on the 1888 * characters which bracket its name. Angle-brackets imply it's 1889 * a system Makefile while double-quotes imply it's a user makefile 1890 */ 1891 if (*file == '<') { 1892 isSystem = TRUE; 1893 endc = '>'; 1894 } else { 1895 isSystem = FALSE; 1896 endc = '"'; 1897 } 1898 1899 /* 1900 * Skip to matching delimiter 1901 */ 1902 for (cp = ++file; *cp && *cp != endc; cp++) { 1903 continue; 1904 } 1905 1906 if (*cp != endc) { 1907 Parse_Error (PARSE_FATAL, 1908 "Unclosed %cinclude filename. '%c' expected", 1909 '.', endc); 1910 return; 1911 } 1912 *cp = '\0'; 1913 1914 /* 1915 * Substitute for any variables in the file name before trying to 1916 * find the thing. 1917 */ 1918 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1919 1920 /* 1921 * Now we know the file's name and its search path, we attempt to 1922 * find the durn thing. A return of NULL indicates the file don't 1923 * exist. 1924 */ 1925 fullname = (char *)NULL; 1926 1927 if (!isSystem) { 1928 /* 1929 * Include files contained in double-quotes are first searched for 1930 * relative to the including file's location. We don't want to 1931 * cd there, of course, so we just tack on the old file's 1932 * leading path components and call Dir_FindFile to see if 1933 * we can locate the beast. 1934 */ 1935 char *prefEnd, *Fname; 1936 1937 /* Make a temporary copy of this, to be safe. */ 1938 Fname = estrdup(curFile.fname); 1939 1940 prefEnd = strrchr (Fname, '/'); 1941 if (prefEnd != (char *)NULL) { 1942 char *newName; 1943 1944 *prefEnd = '\0'; 1945 if (file[0] == '/') 1946 newName = estrdup(file); 1947 else 1948 newName = str_concat (Fname, file, STR_ADDSLASH); 1949 fullname = Dir_FindFile (newName, parseIncPath); 1950 if (fullname == (char *)NULL) { 1951 fullname = Dir_FindFile(newName, dirSearchPath); 1952 } 1953 free (newName); 1954 *prefEnd = '/'; 1955 } else { 1956 fullname = (char *)NULL; 1957 } 1958 free (Fname); 1959 if (fullname == (char *)NULL) { 1960 /* 1961 * Makefile wasn't found in same directory as included makefile. 1962 * Search for it first on the -I search path, 1963 * then on the .PATH search path, if not found in a -I directory. 1964 * XXX: Suffix specific? 1965 */ 1966 fullname = Dir_FindFile (file, parseIncPath); 1967 if (fullname == (char *)NULL) { 1968 fullname = Dir_FindFile(file, dirSearchPath); 1969 } 1970 } 1971 } 1972 1973 /* Looking for a system file or file still not found */ 1974 if (fullname == (char *)NULL) { 1975 /* 1976 * Look for it on the system path 1977 */ 1978 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1979 } 1980 1981 if (fullname == (char *) NULL) { 1982 *cp = endc; 1983 if (!silent) 1984 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1985 return; 1986 } 1987 1988 free(file); 1989 1990 /* 1991 * Once we find the absolute path to the file, we get to save all the 1992 * state from the current file before we can start reading this 1993 * include file. The state is stored in an IFile structure which 1994 * is placed on a list with other IFile structures. The list makes 1995 * a very nice stack to track how we got here... 1996 */ 1997 oldFile = (IFile *) emalloc (sizeof (IFile)); 1998 1999 memcpy(oldFile, &curFile, sizeof (IFile)); 2000 2001 (void) Lst_AtFront (includes, (ClientData)oldFile); 2002 2003 /* 2004 * Once the previous state has been saved, we can get down to reading 2005 * the new file. We set up the name of the file to be the absolute 2006 * name of the include file so error messages refer to the right 2007 * place. Naturally enough, we start reading at line number 0. 2008 */ 2009 curFile.fname = fullname; 2010 curFile.lineno = 0; 2011 2012 ParseSetParseFile(curFile.fname); 2013 2014 curFile.F = fopen (fullname, "r"); 2015 curFile.P = NULL; 2016 2017 if (curFile.F == (FILE * ) NULL) { 2018 if (!silent) 2019 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 2020 /* 2021 * Pop to previous file 2022 */ 2023 (void) ParseEOF(0); 2024 } 2025 } 2026 2027 2028 /*- 2029 *--------------------------------------------------------------------- 2030 * ParseSetParseFile -- 2031 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2032 * basename of the given filename 2033 * 2034 * Results: 2035 * None 2036 * 2037 * Side Effects: 2038 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2039 * dirname and basename of the given filename. 2040 *--------------------------------------------------------------------- 2041 */ 2042 static void 2043 ParseSetParseFile(char *filename) 2044 { 2045 char *slash; 2046 2047 slash = strrchr(filename, '/'); 2048 if (slash == 0) { 2049 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 2050 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 2051 } else { 2052 *slash = '\0'; 2053 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 2054 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 2055 *slash = '/'; 2056 } 2057 } 2058 2059 2060 /*- 2061 *--------------------------------------------------------------------- 2062 * Parse_FromString -- 2063 * Start Parsing from the given string 2064 * 2065 * Results: 2066 * None 2067 * 2068 * Side Effects: 2069 * A structure is added to the includes Lst and readProc, lineno, 2070 * fname and curFILE are altered for the new file 2071 *--------------------------------------------------------------------- 2072 */ 2073 void 2074 Parse_FromString(char *str, int lineno) 2075 { 2076 IFile *oldFile; /* state associated with this file */ 2077 2078 if (DEBUG(FOR)) 2079 (void) fprintf(stderr, "%s\n---- at line %d\n", str, lineno); 2080 2081 oldFile = (IFile *) emalloc (sizeof (IFile)); 2082 memcpy(oldFile, &curFile, sizeof (IFile)); 2083 2084 (void) Lst_AtFront (includes, (ClientData)oldFile); 2085 2086 curFile.F = NULL; 2087 curFile.P = (PTR *) emalloc (sizeof (PTR)); 2088 curFile.P->str = curFile.P->ptr = str; 2089 curFile.lineno = lineno; 2090 curFile.fname = estrdup(curFile.fname); 2091 } 2092 2093 2094 #ifdef SYSVINCLUDE 2095 /*- 2096 *--------------------------------------------------------------------- 2097 * ParseTraditionalInclude -- 2098 * Push to another file. 2099 * 2100 * The input is the current line. The file name(s) are 2101 * following the "include". 2102 * 2103 * Results: 2104 * None 2105 * 2106 * Side Effects: 2107 * A structure is added to the includes Lst and readProc, lineno, 2108 * fname and curFILE are altered for the new file 2109 *--------------------------------------------------------------------- 2110 */ 2111 static void 2112 ParseTraditionalInclude(char *line) 2113 { 2114 char *fullname; /* full pathname of file */ 2115 IFile *oldFile; /* state associated with current file */ 2116 char *cp; /* current position in file spec */ 2117 char *prefEnd; 2118 int done = 0; 2119 int silent = (line[0] != 'i') ? 1 : 0; 2120 char *file = &line[silent + 7]; 2121 char *cfname; 2122 size_t clineno; 2123 2124 cfname = curFile.fname; 2125 clineno = curFile.lineno; 2126 2127 /* 2128 * Skip over whitespace 2129 */ 2130 while (isspace((unsigned char)*file)) 2131 file++; 2132 2133 if (*file == '\0') { 2134 Parse_Error (PARSE_FATAL, 2135 "Filename missing from \"include\""); 2136 return; 2137 } 2138 2139 for (; !done; file = cp + 1) { 2140 /* 2141 * Skip to end of line or next whitespace 2142 */ 2143 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2144 continue; 2145 2146 if (*cp) 2147 *cp = '\0'; 2148 else 2149 done = 1; 2150 2151 /* 2152 * Substitute for any variables in the file name before trying to 2153 * find the thing. 2154 */ 2155 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2156 2157 /* 2158 * Now we know the file's name, we attempt to find the durn thing. 2159 * A return of NULL indicates the file don't exist. 2160 * 2161 * Include files are first searched for relative to the including 2162 * file's location. We don't want to cd there, of course, so we 2163 * just tack on the old file's leading path components and call 2164 * Dir_FindFile to see if we can locate the beast. 2165 * XXX - this *does* search in the current directory, right? 2166 */ 2167 2168 prefEnd = strrchr(cfname, '/'); 2169 if (prefEnd != NULL) { 2170 char *newName; 2171 2172 *prefEnd = '\0'; 2173 newName = str_concat(cfname, file, STR_ADDSLASH); 2174 fullname = Dir_FindFile(newName, parseIncPath); 2175 if (fullname == NULL) { 2176 fullname = Dir_FindFile(newName, dirSearchPath); 2177 } 2178 free (newName); 2179 *prefEnd = '/'; 2180 } else { 2181 fullname = NULL; 2182 } 2183 2184 if (fullname == NULL) { 2185 /* 2186 * System makefile or makefile wasn't found in same directory as 2187 * included makefile. Search for it first on the -I search path, 2188 * then on the .PATH search path, if not found in a 2189 * -I directory. XXX: Suffix specific? 2190 */ 2191 fullname = Dir_FindFile(file, parseIncPath); 2192 if (fullname == NULL) { 2193 fullname = Dir_FindFile(file, dirSearchPath); 2194 } 2195 } 2196 2197 if (fullname == NULL) { 2198 /* 2199 * Still haven't found the makefile. Look for it on the system 2200 * path as a last resort. 2201 */ 2202 fullname = Dir_FindFile(file, 2203 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2204 } 2205 2206 if (fullname == NULL) { 2207 if (!silent) 2208 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2209 "Could not find %s", file); 2210 free(file); 2211 continue; 2212 } 2213 2214 free(file); 2215 2216 /* 2217 * Once we find the absolute path to the file, we get to save all 2218 * the state from the current file before we can start reading this 2219 * include file. The state is stored in an IFile structure which 2220 * is placed on a list with other IFile structures. The list makes 2221 * a very nice stack to track how we got here... 2222 */ 2223 oldFile = (IFile *) emalloc(sizeof(IFile)); 2224 memcpy(oldFile, &curFile, sizeof (IFile)); 2225 2226 (void) Lst_AtFront(includes, (ClientData)oldFile); 2227 2228 /* 2229 * Once the previous state has been saved, we can get down to 2230 * reading the new file. We set up the name of the file to be the 2231 * absolute name of the include file so error messages refer to the 2232 * right place. Naturally enough, we start reading at line number 0. 2233 */ 2234 curFile.fname = fullname; 2235 curFile.lineno = 0; 2236 2237 curFile.F = fopen(fullname, "r"); 2238 curFile.P = NULL; 2239 2240 if (curFile.F == NULL) { 2241 if (!silent) 2242 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2243 "Cannot open %s", fullname); 2244 /* 2245 * Pop to previous file 2246 */ 2247 (void) ParseEOF(1); 2248 } 2249 } 2250 } 2251 #endif 2252 2253 /*- 2254 *--------------------------------------------------------------------- 2255 * ParseEOF -- 2256 * Called when EOF is reached in the current file. If we were reading 2257 * an include file, the includes stack is popped and things set up 2258 * to go back to reading the previous file at the previous location. 2259 * 2260 * Results: 2261 * CONTINUE if there's more to do. DONE if not. 2262 * 2263 * Side Effects: 2264 * The old curFILE, is closed. The includes list is shortened. 2265 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2266 *--------------------------------------------------------------------- 2267 */ 2268 static int 2269 ParseEOF(int opened) 2270 { 2271 IFile *ifile; /* the state on the top of the includes stack */ 2272 2273 if (Lst_IsEmpty (includes)) { 2274 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2275 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2276 return (DONE); 2277 } 2278 2279 ifile = (IFile *) Lst_DeQueue (includes); 2280 2281 /* XXX dispose of curFile info */ 2282 free ((Address) curFile.fname); 2283 if (opened && curFile.F) 2284 (void) fclose (curFile.F); 2285 if (curFile.P) { 2286 free((Address) curFile.P->str); 2287 free((Address) curFile.P); 2288 } 2289 2290 memcpy(&curFile, ifile, sizeof (IFile)); 2291 2292 free ((Address)ifile); 2293 2294 /* pop the PARSEDIR/PARSEFILE variables */ 2295 ParseSetParseFile(curFile.fname); 2296 return (CONTINUE); 2297 } 2298 2299 /*- 2300 *--------------------------------------------------------------------- 2301 * ParseReadc -- 2302 * Read a character from the current file 2303 * 2304 * Results: 2305 * The character that was read 2306 * 2307 * Side Effects: 2308 *--------------------------------------------------------------------- 2309 */ 2310 static __inline int 2311 ParseReadc(void) 2312 { 2313 if (curFile.F) 2314 return fgetc(curFile.F); 2315 2316 if (curFile.P && *curFile.P->ptr) 2317 return *curFile.P->ptr++; 2318 return EOF; 2319 } 2320 2321 2322 /*- 2323 *--------------------------------------------------------------------- 2324 * ParseUnreadc -- 2325 * Put back a character to the current file 2326 * 2327 * Results: 2328 * None. 2329 * 2330 * Side Effects: 2331 *--------------------------------------------------------------------- 2332 */ 2333 static void 2334 ParseUnreadc(int c) 2335 { 2336 if (curFile.F) { 2337 ungetc(c, curFile.F); 2338 return; 2339 } 2340 if (curFile.P) { 2341 *--(curFile.P->ptr) = c; 2342 return; 2343 } 2344 } 2345 2346 2347 /* ParseSkipLine(): 2348 * Grab the next line 2349 * 2350 * Input: 2351 * skip Skip lines that don't start with . 2352 * keep_newline Keep newline character as is. 2353 * 2354 */ 2355 static char * 2356 ParseSkipLine(int skip, int keep_newline) 2357 { 2358 char *line; 2359 int c, lastc, lineLength = 0; 2360 Buffer buf; 2361 2362 buf = Buf_Init(MAKE_BSIZE); 2363 2364 do { 2365 Buf_Discard(buf, lineLength); 2366 lastc = '\0'; 2367 2368 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2369 && c != EOF) { 2370 if (c == '\n') { 2371 if (keep_newline) 2372 Buf_AddByte(buf, (Byte)c); 2373 else 2374 Buf_ReplaceLastByte(buf, (Byte)' '); 2375 curFile.lineno++; 2376 2377 while ((c = ParseReadc()) == ' ' || c == '\t'); 2378 2379 if (c == EOF) 2380 break; 2381 } 2382 2383 Buf_AddByte(buf, (Byte)c); 2384 lastc = c; 2385 } 2386 2387 if (c == EOF) { 2388 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2389 Buf_Destroy(buf, TRUE); 2390 return((char *)NULL); 2391 } 2392 2393 curFile.lineno++; 2394 Buf_AddByte(buf, (Byte)'\0'); 2395 line = (char *)Buf_GetAll(buf, &lineLength); 2396 } while (skip == 1 && line[0] != '.'); 2397 2398 Buf_Destroy(buf, FALSE); 2399 return line; 2400 } 2401 2402 2403 /*- 2404 *--------------------------------------------------------------------- 2405 * ParseReadLine -- 2406 * Read an entire line from the input file. Called only by Parse_File. 2407 * To facilitate escaped newlines and what have you, a character is 2408 * buffered in 'lastc', which is '\0' when no characters have been 2409 * read. When we break out of the loop, c holds the terminating 2410 * character and lastc holds a character that should be added to 2411 * the line (unless we don't read anything but a terminator). 2412 * 2413 * Results: 2414 * A line w/o its newline 2415 * 2416 * Side Effects: 2417 * Only those associated with reading a character 2418 *--------------------------------------------------------------------- 2419 */ 2420 static char * 2421 ParseReadLine(void) 2422 { 2423 Buffer buf; /* Buffer for current line */ 2424 int c; /* the current character */ 2425 int lastc; /* The most-recent character */ 2426 Boolean semiNL; /* treat semi-colons as newlines */ 2427 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2428 * for the purposes of setting semiNL */ 2429 Boolean ignComment; /* TRUE if should ignore comments (in a 2430 * shell command */ 2431 char *line; /* Result */ 2432 char *ep; /* to strip trailing blanks */ 2433 int lineLength; /* Length of result */ 2434 int lineno; /* Saved line # */ 2435 2436 semiNL = FALSE; 2437 ignDepOp = FALSE; 2438 ignComment = FALSE; 2439 2440 /* 2441 * Handle special-characters at the beginning of the line. Either a 2442 * leading tab (shell command) or pound-sign (possible conditional) 2443 * forces us to ignore comments and dependency operators and treat 2444 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2445 * discards completely blank lines. 2446 */ 2447 for (;;) { 2448 c = ParseReadc(); 2449 2450 if (c == '\t') { 2451 ignComment = ignDepOp = TRUE; 2452 break; 2453 } else if (c == '\n') { 2454 curFile.lineno++; 2455 } else if (c == '#') { 2456 ParseUnreadc(c); 2457 break; 2458 } else { 2459 /* 2460 * Anything else breaks out without doing anything 2461 */ 2462 break; 2463 } 2464 } 2465 2466 if (c != EOF) { 2467 lastc = c; 2468 buf = Buf_Init(MAKE_BSIZE); 2469 2470 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2471 (c != EOF)) 2472 { 2473 test_char: 2474 switch(c) { 2475 case '\n': 2476 /* 2477 * Escaped newline: read characters until a non-space or an 2478 * unescaped newline and replace them all by a single space. 2479 * This is done by storing the space over the backslash and 2480 * dropping through with the next nonspace. If it is a 2481 * semi-colon and semiNL is TRUE, it will be recognized as a 2482 * newline in the code below this... 2483 */ 2484 curFile.lineno++; 2485 lastc = ' '; 2486 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2487 continue; 2488 } 2489 if (c == EOF || c == '\n') { 2490 goto line_read; 2491 } else { 2492 /* 2493 * Check for comments, semiNL's, etc. -- easier than 2494 * ParseUnreadc(c); continue; 2495 */ 2496 goto test_char; 2497 } 2498 /*NOTREACHED*/ 2499 break; 2500 2501 case ';': 2502 /* 2503 * Semi-colon: Need to see if it should be interpreted as a 2504 * newline 2505 */ 2506 if (semiNL) { 2507 /* 2508 * To make sure the command that may be following this 2509 * semi-colon begins with a tab, we push one back into the 2510 * input stream. This will overwrite the semi-colon in the 2511 * buffer. If there is no command following, this does no 2512 * harm, since the newline remains in the buffer and the 2513 * whole line is ignored. 2514 */ 2515 ParseUnreadc('\t'); 2516 goto line_read; 2517 } 2518 break; 2519 case '=': 2520 if (!semiNL) { 2521 /* 2522 * Haven't seen a dependency operator before this, so this 2523 * must be a variable assignment -- don't pay attention to 2524 * dependency operators after this. 2525 */ 2526 ignDepOp = TRUE; 2527 } else if (lastc == ':' || lastc == '!') { 2528 /* 2529 * Well, we've seen a dependency operator already, but it 2530 * was the previous character, so this is really just an 2531 * expanded variable assignment. Revert semi-colons to 2532 * being just semi-colons again and ignore any more 2533 * dependency operators. 2534 * 2535 * XXX: Note that a line like "foo : a:=b" will blow up, 2536 * but who'd write a line like that anyway? 2537 */ 2538 ignDepOp = TRUE; semiNL = FALSE; 2539 } 2540 break; 2541 case '#': 2542 if (!ignComment) { 2543 if ( 2544 #if 0 2545 compatMake && 2546 #endif 2547 (lastc != '\\')) { 2548 /* 2549 * If the character is a hash mark and it isn't escaped 2550 * (or we're being compatible), the thing is a comment. 2551 * Skip to the end of the line. 2552 */ 2553 do { 2554 c = ParseReadc(); 2555 } while ((c != '\n') && (c != EOF)); 2556 goto line_read; 2557 } else { 2558 /* 2559 * Don't add the backslash. Just let the # get copied 2560 * over. 2561 */ 2562 lastc = c; 2563 continue; 2564 } 2565 } 2566 break; 2567 case ':': 2568 case '!': 2569 if (!ignDepOp && (c == ':' || c == '!')) { 2570 /* 2571 * A semi-colon is recognized as a newline only on 2572 * dependency lines. Dependency lines are lines with a 2573 * colon or an exclamation point. Ergo... 2574 */ 2575 semiNL = TRUE; 2576 } 2577 break; 2578 } 2579 /* 2580 * Copy in the previous character and save this one in lastc. 2581 */ 2582 Buf_AddByte (buf, (Byte)lastc); 2583 lastc = c; 2584 2585 } 2586 line_read: 2587 curFile.lineno++; 2588 2589 if (lastc != '\0') { 2590 Buf_AddByte (buf, (Byte)lastc); 2591 } 2592 Buf_AddByte (buf, (Byte)'\0'); 2593 line = (char *)Buf_GetAll (buf, &lineLength); 2594 Buf_Destroy (buf, FALSE); 2595 2596 /* 2597 * Strip trailing blanks and tabs from the line. 2598 * Do not strip a blank or tab that is preceded by 2599 * a '\' 2600 */ 2601 ep = line; 2602 while (*ep) 2603 ++ep; 2604 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2605 if (ep > line + 1 && ep[-2] == '\\') 2606 break; 2607 --ep; 2608 } 2609 *ep = 0; 2610 2611 if (line[0] == '.') { 2612 /* 2613 * The line might be a conditional. Ask the conditional module 2614 * about it and act accordingly 2615 */ 2616 switch (Cond_Eval (line)) { 2617 case COND_SKIP: 2618 /* 2619 * Skip to next conditional that evaluates to COND_PARSE. 2620 */ 2621 do { 2622 free (line); 2623 line = ParseSkipLine(1, 0); 2624 } while (line && Cond_Eval(line) != COND_PARSE); 2625 if (line == NULL) 2626 break; 2627 /*FALLTHRU*/ 2628 case COND_PARSE: 2629 free ((Address) line); 2630 line = ParseReadLine(); 2631 break; 2632 case COND_INVALID: 2633 lineno = curFile.lineno; 2634 if (For_Eval(line)) { 2635 int ok; 2636 free(line); 2637 do { 2638 /* 2639 * Skip after the matching end 2640 */ 2641 line = ParseSkipLine(0, 1); 2642 if (line == NULL) { 2643 Parse_Error (PARSE_FATAL, 2644 "Unexpected end of file in for loop.\n"); 2645 break; 2646 } 2647 ok = For_Eval(line); 2648 free(line); 2649 } 2650 while (ok); 2651 if (line != NULL) 2652 For_Run(lineno); 2653 line = ParseReadLine(); 2654 } 2655 break; 2656 } 2657 } 2658 return (line); 2659 2660 } else { 2661 /* 2662 * Hit end-of-file, so return a NULL line to indicate this. 2663 */ 2664 return((char *)NULL); 2665 } 2666 } 2667 2668 /*- 2669 *----------------------------------------------------------------------- 2670 * ParseFinishLine -- 2671 * Handle the end of a dependency group. 2672 * 2673 * Results: 2674 * Nothing. 2675 * 2676 * Side Effects: 2677 * inLine set FALSE. 'targets' list destroyed. 2678 * 2679 *----------------------------------------------------------------------- 2680 */ 2681 static void 2682 ParseFinishLine(void) 2683 { 2684 if (inLine) { 2685 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2686 Lst_Destroy (targets, ParseHasCommands); 2687 targets = NULL; 2688 inLine = FALSE; 2689 } 2690 } 2691 2692 2693 /*- 2694 *--------------------------------------------------------------------- 2695 * Parse_File -- 2696 * Parse a file into its component parts, incorporating it into the 2697 * current dependency graph. This is the main function and controls 2698 * almost every other function in this module 2699 * 2700 * Input: 2701 * name the name of the file being read 2702 * stream Stream open to makefile to parse 2703 * 2704 * Results: 2705 * None 2706 * 2707 * Side Effects: 2708 * Loads. Nodes are added to the list of all targets, nodes and links 2709 * are added to the dependency graph. etc. etc. etc. 2710 *--------------------------------------------------------------------- 2711 */ 2712 void 2713 Parse_File(const char *name, FILE *stream) 2714 { 2715 char *cp, /* pointer into the line */ 2716 *line; /* the line we're working on */ 2717 2718 inLine = FALSE; 2719 fatals = 0; 2720 2721 curFile.fname = UNCONST(name); 2722 curFile.F = stream; 2723 curFile.lineno = 0; 2724 2725 ParseSetParseFile(curFile.fname); 2726 2727 do { 2728 while ((line = ParseReadLine ()) != NULL) { 2729 if (*line == '.') { 2730 /* 2731 * Lines that begin with the special character are either 2732 * include or undef directives. 2733 */ 2734 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2735 continue; 2736 } 2737 if (strncmp(cp, "include", 7) == 0 || 2738 ((cp[0] == 's' || cp[0] == '-') && 2739 strncmp(&cp[1], "include", 7) == 0)) { 2740 ParseDoInclude (cp); 2741 goto nextLine; 2742 } else if (strncmp(cp, "undef", 5) == 0) { 2743 char *cp2; 2744 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2745 continue; 2746 } 2747 2748 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2749 (*cp2 != '\0'); cp2++) { 2750 continue; 2751 } 2752 2753 *cp2 = '\0'; 2754 2755 Var_Delete(cp, VAR_GLOBAL); 2756 goto nextLine; 2757 } 2758 } 2759 if (*line == '#') { 2760 /* If we're this far, the line must be a comment. */ 2761 goto nextLine; 2762 } 2763 2764 if (*line == '\t') { 2765 /* 2766 * If a line starts with a tab, it can only hope to be 2767 * a creation command. 2768 */ 2769 #ifndef POSIX 2770 shellCommand: 2771 #endif 2772 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2773 continue; 2774 } 2775 if (*cp) { 2776 if (inLine) { 2777 /* 2778 * So long as it's not a blank line and we're actually 2779 * in a dependency spec, add the command to the list of 2780 * commands of all targets in the dependency spec 2781 */ 2782 Lst_ForEach (targets, ParseAddCmd, cp); 2783 #ifdef CLEANUP 2784 Lst_AtEnd(targCmds, (ClientData) line); 2785 #endif 2786 continue; 2787 } else { 2788 Parse_Error (PARSE_FATAL, 2789 "Unassociated shell command \"%s\"", 2790 cp); 2791 } 2792 } 2793 #ifdef SYSVINCLUDE 2794 } else if (((strncmp(line, "include", 7) == 0 && 2795 isspace((unsigned char) line[7])) || 2796 ((line[0] == 's' || line[0] == '-') && 2797 strncmp(&line[1], "include", 7) == 0 && 2798 isspace((unsigned char) line[8]))) && 2799 strchr(line, ':') == NULL) { 2800 /* 2801 * It's an S3/S5-style "include". 2802 */ 2803 ParseTraditionalInclude (line); 2804 goto nextLine; 2805 #endif 2806 } else if (Parse_IsVar (line)) { 2807 ParseFinishLine(); 2808 Parse_DoVar (line, VAR_GLOBAL); 2809 } else { 2810 /* 2811 * We now know it's a dependency line so it needs to have all 2812 * variables expanded before being parsed. Tell the variable 2813 * module to complain if some variable is undefined... 2814 * To make life easier on novices, if the line is indented we 2815 * first make sure the line has a dependency operator in it. 2816 * If it doesn't have an operator and we're in a dependency 2817 * line's script, we assume it's actually a shell command 2818 * and add it to the current list of targets. 2819 */ 2820 #ifndef POSIX 2821 Boolean nonSpace = FALSE; 2822 #endif 2823 2824 cp = line; 2825 if (isspace((unsigned char) line[0])) { 2826 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2827 cp++; 2828 } 2829 if (*cp == '\0') { 2830 goto nextLine; 2831 } 2832 #ifndef POSIX 2833 while (*cp && (ParseIsEscaped(line, cp) || 2834 (*cp != ':') && (*cp != '!'))) { 2835 nonSpace = TRUE; 2836 cp++; 2837 } 2838 #endif 2839 } 2840 2841 #ifndef POSIX 2842 if (*cp == '\0') { 2843 if (inLine) { 2844 Parse_Error (PARSE_WARNING, 2845 "Shell command needs a leading tab"); 2846 goto shellCommand; 2847 } else if (nonSpace) { 2848 Parse_Error (PARSE_FATAL, "Missing operator"); 2849 } 2850 } else { 2851 #endif 2852 ParseFinishLine(); 2853 2854 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2855 free (line); 2856 line = cp; 2857 2858 /* 2859 * Need a non-circular list for the target nodes 2860 */ 2861 if (targets) 2862 Lst_Destroy(targets, NOFREE); 2863 2864 targets = Lst_Init (FALSE); 2865 inLine = TRUE; 2866 2867 ParseDoDependency (line); 2868 #ifndef POSIX 2869 } 2870 #endif 2871 } 2872 2873 nextLine: 2874 2875 free (line); 2876 } 2877 /* 2878 * Reached EOF, but it may be just EOF of an include file... 2879 */ 2880 } while (ParseEOF(1) == CONTINUE); 2881 2882 /* 2883 * Make sure conditionals are clean 2884 */ 2885 Cond_End(); 2886 2887 if (fatals) { 2888 (void)fprintf(stderr, 2889 "%s: Fatal errors encountered -- cannot continue\n", 2890 progname); 2891 PrintOnError(NULL); 2892 exit (1); 2893 } 2894 } 2895 2896 /*- 2897 *--------------------------------------------------------------------- 2898 * Parse_Init -- 2899 * initialize the parsing module 2900 * 2901 * Results: 2902 * none 2903 * 2904 * Side Effects: 2905 * the parseIncPath list is initialized... 2906 *--------------------------------------------------------------------- 2907 */ 2908 void 2909 Parse_Init(void) 2910 { 2911 mainNode = NILGNODE; 2912 parseIncPath = Lst_Init (FALSE); 2913 sysIncPath = Lst_Init (FALSE); 2914 defIncPath = Lst_Init (FALSE); 2915 includes = Lst_Init (FALSE); 2916 #ifdef CLEANUP 2917 targCmds = Lst_Init (FALSE); 2918 #endif 2919 } 2920 2921 void 2922 Parse_End(void) 2923 { 2924 #ifdef CLEANUP 2925 Lst_Destroy(targCmds, (void (*)(ClientData))) free; 2926 if (targets) 2927 Lst_Destroy(targets, NOFREE); 2928 Lst_Destroy(defIncPath, Dir_Destroy); 2929 Lst_Destroy(sysIncPath, Dir_Destroy); 2930 Lst_Destroy(parseIncPath, Dir_Destroy); 2931 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2932 #endif 2933 } 2934 2935 2936 /*- 2937 *----------------------------------------------------------------------- 2938 * Parse_MainName -- 2939 * Return a Lst of the main target to create for main()'s sake. If 2940 * no such target exists, we Punt with an obnoxious error message. 2941 * 2942 * Results: 2943 * A Lst of the single node to create. 2944 * 2945 * Side Effects: 2946 * None. 2947 * 2948 *----------------------------------------------------------------------- 2949 */ 2950 Lst 2951 Parse_MainName(void) 2952 { 2953 Lst mainList; /* result list */ 2954 2955 mainList = Lst_Init (FALSE); 2956 2957 if (mainNode == NILGNODE) { 2958 Punt ("no target to make."); 2959 /*NOTREACHED*/ 2960 } else if (mainNode->type & OP_DOUBLEDEP) { 2961 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2962 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2963 } 2964 else 2965 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2966 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2967 return (mainList); 2968 } 2969 2970 /*- 2971 *----------------------------------------------------------------------- 2972 * ParseMark -- 2973 * Add the filename and lineno to the GNode so that we remember 2974 * where it was first defined. 2975 * 2976 * Side Effects: 2977 * None. 2978 * 2979 *----------------------------------------------------------------------- 2980 */ 2981 static void 2982 ParseMark(GNode *gn) 2983 { 2984 gn->fname = strdup(curFile.fname); 2985 gn->lineno = curFile.lineno; 2986 } 2987